Finding the Fourth Proportional to 8,957.80, 13,435.98 and 3,113.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,957.80 : 13,435.98 = 3,113.56 : x
2. Step 2: Convert to fraction form
   8,957.80/13,435.98 = 3,113.56/x
3. Step 3: Cross multiply
   8,957.80x = 13,435.98 × 3,113.56
4. Step 4: Simplify right side
   8,957.80x = 41,833,729.89
5. Step 5: Solve for x
   x = 41,833,729.89/8,957.80
6. Step 6: Final answer
   x = 4,670.09